<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
		<title></title>
		<style type="text/css">
			body{
				background: red;
			}
			img{
				display: block;
				margin: 40px auto;
				width: 200px;
				height: 200px;
				/*W3C浏览器 取值0-1*/
				opacity: 0.4;
				
				/*IE浏览器 取值0-100*/
				filter: alpha(opacity=50);
			}
		</style>
	</head>
	<body>
		<img src="minions.jpg"/>
	</body>
</html>
